SSL Report: mail.giordano.com.sg (203.125.190.168)
Assessed on:  Fri, 13 Jun 2025 03:37:27 UTC | Clear cache

Due to a recently discovered bug in Apple's code, your browser is exposed to MITM attacks. Click here for more information.

Summary
Overall Rating
F
0
20
40
60
80
100
Certificate
 
Protocol Support
 
Key Exchange
 
Cipher Strength
 

Visit our documentation page for more information, configuration guides, and books. Known issues are documented here.
This server's certificate is not trusted, see below for details.
This server supports SSL 2, which is obsolete and insecure, and can be used against TLS (DROWN attack). Grade set to F.   MORE INFO »
This server is vulnerable to MITM attacks because it supports insecure renegotiation. Grade set to F.
This server uses SSL 3, which is obsolete and insecure. Grade capped to B. MORE INFO »
The server supports only older protocols, but not the current best TLS 1.2 or TLS 1.3. Grade capped to C.  MORE INFO »
This server accepts RC4 cipher, but only with older protocols. Grade capped to B.  MORE INFO »
This server does not support Forward Secrecy with the reference browsers. Grade capped to B.  MORE INFO »
This server does not support Authenticated encryption (AEAD) cipher suites. Grade capped to B.  MORE INFO »
This server supports TLS 1.0. Grade capped to B. MORE INFO »
This server does not support TLS 1.3.  MORE INFO »
Certificate #1: RSA 2048 bits (SHA256withRSA)
Server Key and Certificate #1
Subject *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=
Common names *.giordano.com
Alternative names *.giordano.com giordano.com   MISMATCH
Serial Number 663cf2411d83ce47fd86ab34e08d9e1b
Valid from Thu, 12 Sep 2024 12:45:45 UTC
Valid until Fri, 12 Sep 2025 12:45:44 UTC (expires in 2 months and 29 days)
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer Xcc Trust OV SSL CA
AIA: http://repository.certum.pl/xinchacha2ov.cer
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL, OCSP
CRL: http://xinchacha2ov.crl.certum.pl/xinchacha2ov.crl
OCSP: http://xinchacha2ov.ocsp-certum.com
Revocation status Good (not revoked)
DNS CAA No (more info)
Trusted No   NOT TRUSTED (Why?)
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2950 bytes)
Chain issues None
#2
Subject Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=
Valid until Wed, 30 Jun 2027 07:48:47 UTC (expires in 2 years)
Key RSA 2048 bits (e 65537)
Issuer Certum Trusted Network CA
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8])
1 Sent by server *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=

RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store Certum Trusted Network CA   Self-signed
Fingerprint SHA256: 5c58468d55f58e497e743982d2b50010b6d165374acf83a7d4a32db768c4408e
Pin SHA256: qiYwp7YXsE0KKUureoyqpQFubb5gSDeoOoVxn6tmfrU=

RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8])
1 Sent by server *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=

RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store Certum Trusted Network CA   Self-signed
Fingerprint SHA256: 5c58468d55f58e497e743982d2b50010b6d165374acf83a7d4a32db768c4408e
Pin SHA256: qiYwp7YXsE0KKUureoyqpQFubb5gSDeoOoVxn6tmfrU=

RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8])
1 Sent by server *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=

RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store Certum Trusted Network CA   Self-signed
Fingerprint SHA256: 5c58468d55f58e497e743982d2b50010b6d165374acf83a7d4a32db768c4408e
Pin SHA256: qiYwp7YXsE0KKUureoyqpQFubb5gSDeoOoVxn6tmfrU=

RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8])
1 Sent by server *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=

RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store Certum Trusted Network CA   Self-signed
Fingerprint SHA256: 5c58468d55f58e497e743982d2b50010b6d165374acf83a7d4a32db768c4408e
Pin SHA256: qiYwp7YXsE0KKUureoyqpQFubb5gSDeoOoVxn6tmfrU=

RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8])
1 Sent by server *.giordano.com
Fingerprint SHA256: 174bec1b1636a4197a870c49dfdb94e9067b11451effe833582135722e4ed8d8
Pin SHA256: 6OhZSt8ANk8Ce8Xs3Q61Tcd2dapIGWE+YVWM2SBGDO4=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Xcc Trust OV SSL CA
Fingerprint SHA256: 2628d65e94d62e57b6344c31b22920eda316d9be68eef5eacc7362206b7deafa
Pin SHA256: oiGjXsvzUgiIjz9R3/nJmlOb0NbGNkMg5pWl3wyi9lU=

RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store Certum Trusted Network CA   Self-signed
Fingerprint SHA256: 5c58468d55f58e497e743982d2b50010b6d165374acf83a7d4a32db768c4408e
Pin SHA256: qiYwp7YXsE0KKUureoyqpQFubb5gSDeoOoVxn6tmfrU=

RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate

Click here to expand

Configuration
Protocols
TLS 1.3 No
TLS 1.2 No
TLS 1.1 No
TLS 1.0 Yes
SSL 3   INSECURE Yes
SSL 2   INSECURE Yes


Cipher Suites
# TLS 1.0 (suites in server-preferred order)
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_RC4_128_SHA (0x5)   INSECURE 128
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)   WEAK 112
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_RSA_WITH_RC4_128_MD5 (0x4)   INSECURE 128
# SSL 3 (suites in server-preferred order)
TLS_RSA_WITH_RC4_128_SHA (0x5)   INSECURE 128
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)   WEAK 112
TLS_RSA_WITH_RC4_128_MD5 (0x4)   INSECURE 128
# SSL 2 (client selects suite)
SSL_CK_RC4_128_WITH_MD5 (0x10080)   INSECURE 128
SSL_CK_DES_192_EDE3_CBC_WITH_MD5 (0x700c0)   INSECURE 112


Handshake Simulation
Android 2.3.7   No SNI 2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.0.4 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.1.1 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.2.2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.3 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.4.2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 5.0.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 6.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 7.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 8.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 8.1 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 9.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Baidu Jan 2015 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
BingPreview Jan 2015 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Chrome 49 / XP SP3 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Chrome 69 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Chrome 70 / Win 10 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Chrome 80 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Firefox 31.3.0 ESR / Win 7 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Firefox 47 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Firefox 49 / XP SP3 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Firefox 62 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Firefox 73 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Googlebot Feb 2018 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 6 / XP   No FS 1   No SNI 2 RSA 2048 (SHA256)   SSL 3 TLS_RSA_WITH_RC4_128_SHA  RC4
IE 7 / Vista RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 8 / XP   No FS 1   No SNI 2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_RC4_128_SHA  RC4
IE 8-10 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win 8.1  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 10 / Win Phone 8.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win Phone 8.1  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win Phone 8.1 Update  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Edge 15 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Edge 16 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Edge 18 / Win 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Edge 13 / Win Phone 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 6u45   No SNI 2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 7u25 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 8u161 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 11.0.3 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 12.0.1 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
OpenSSL 0.9.8y RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
OpenSSL 1.0.1l  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
OpenSSL 1.0.2s  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
OpenSSL 1.1.0k  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
OpenSSL 1.1.1c  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 5.1.9 / OS X 10.6.8 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 6 / iOS 6.0.1 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 6.0.4 / OS X 10.8.4  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 7 / iOS 7.1  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 7 / OS X 10.9  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 8 / iOS 8.4  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 8 / OS X 10.10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 9 / iOS 9  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 9 / OS X 10.11  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 10 / iOS 10  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 10 / OS X 10.12  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 12.1.2 / MacOS 10.14.6 Beta  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Safari 12.1.1 / iOS 12.3.1  R RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Yahoo Slurp Jan 2015 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
YandexBot Jan 2015 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
# Not simulated clients (Protocol mismatch)
Apple ATS 9 / iOS 9  R Protocol mismatch (not simulated)

Click here to expand

(1) Clients that do not support Forward Secrecy (FS) are excluded when determining support for it.
(2) No support for virtual SSL hosting (SNI). Connects to the default site if the server uses SNI.
(3) Only first connection attempt simulated. Browsers sometimes retry with a lower protocol version.
(R) Denotes a reference browser or client, with which we expect better effective security.
(All) We use defaults, but some platforms do not use their best protocols and features (e.g., Java 6 & 7, older IE).
(All) Certificate trust is not checked in handshake simulation, we only perform TLS handshake.


Protocol Details
Secure Renegotiation Supported
Secure Client-Initiated Renegotiation Yes
Insecure Client-Initiated Renegotiation Supported   INSECURE (more info)
BEAST attack Not mitigated server-side (more info)   SSL 3: 0x5, TLS 1.0: 0x2f
POODLE (SSLv3) No, mitigated (more info)   SSL 3: 0x5
POODLE (TLS) No (more info)
Zombie POODLE No (more info)   TLS 1.0 : 0x002f
GOLDENDOODLE No (more info)   TLS 1.0 : 0x002f
OpenSSL 0-Length No (more info)   TLS 1.0 : 0x002f
Sleeping POODLE No (more info)   TLS 1.0 : 0x002f
Downgrade attack prevention No, TLS_FALLBACK_SCSV not supported (more info)
SSL/TLS compression No
RC4 Yes   INSECURE (more info)
Heartbeat (extension) No
Heartbleed (vulnerability) No (more info)
Ticketbleed (vulnerability) No (more info)
OpenSSL CCS vuln. (CVE-2014-0224) No (more info)
OpenSSL Padding Oracle vuln.
(CVE-2016-2107)
No (more info)
ROBOT (vulnerability) No (more info)
Forward Secrecy No   WEAK (more info)
ALPN No
NPN No
Session resumption (caching) No (IDs assigned but not accepted)
Session resumption (tickets) No
OCSP stapling No
Strict Transport Security (HSTS) No
HSTS Preloading Not in: Chrome  Edge  Firefox  IE 
Public Key Pinning (HPKP) No (more info)
Public Key Pinning Report-Only No
Public Key Pinning (Static) No (more info)
Long handshake intolerance No
TLS extension intolerance No
TLS version intolerance No
Incorrect SNI alerts No
Uses common DH primes No, DHE suites not supported
DH public server param (Ys) reuse No, DHE suites not supported
ECDH public server param reuse Yes
Supported Named Groups secp256r1, secp384r1 (server preferred order)
SSL 2 handshake compatibility Yes


HTTP Requests
1 https://mail.giordano.com.sg/  (HTTP/1.1 403 Forbidden ( The server denied the specified Uniform Resource Locator (URL). Contact the server administrator. ))
1
Connection close
Pragma no-cache
Cache-Control no-cache
Content-Type text/html
Content-Length 2040


Miscellaneous
Test date Fri, 13 Jun 2025 03:34:19 UTC
Test duration 187.402 seconds
HTTP status code 403
HTTP server signature -
Server hostname mail.giordano.com.sg


Why is my certificate not trusted?

There are many reasons why a certificate may not be trusted. The exact problem is indicated on the report card in bright red. The problems fall into three categories:

  1. Invalid certificate
  2. Invalid configuration
  3. Unknown Certificate Authority

1. Invalid certificate

A certificate is invalid if:

2. Invalid configuration

In some cases, the certificate chain does not contain all the necessary certificates to connect the web server certificate to one of the root certificates in our trust store. Less commonly, one of the certificates in the chain (other than the web server certificate) will have expired, and that invalidates the entire chain.

3. Unknown Certificate Authority

In order for trust to be established, we must have the root certificate of the signing Certificate Authority in our trust store. SSL Labs does not maintain its own trust store; instead we use the store maintained by Mozilla.

If we mark a web site as not trusted, that means that the average web user's browser will not trust it either. For certain special groups of users, such web sites can still be secure. For example, if you can securely verify that a self-signed web site is operated by a person you trust, then you can trust that self-signed web site too. Or, if you work for an organisation that manages its own trust, and you have their own root certificate already embedded in your browser. Such special cases do not work for the general public, however, and this is what we indicate on our report card.

4. Interoperability issues

In some rare cases trust cannot be established because of interoperability issues between our code and the code or configuration running on the server. We manually review such cases, but if you encounter such an issue please feel free to contact us. Such problems are very difficult to troubleshoot and you may be able to provide us with information that might help us determine the root cause.

SSL Report v2.4.0